Sliding door.



C. M. DONALDSON.

SLIDING DOOR. APPL1o4TIoN FILED SEPT. 13. 1907.

Patented Jan.25, 1910.

UNITED STATES nATijNr OFFICE.

OHARLES M. DONALDSON, OF CHARBON, OHIO.

SLIDING- DOOR.

T o all whom it may concern.'

Be it known that I, CHARLES M. DONALD- SON, a citizen of the United States of America, residing at Chardon, in the county of Geauga and AState of Ohio, have invented new and useful Improvements in Sliding Doors, of which the following is a specification.

This invention relates to improvements in sliding doors for use on railway freight cars and other structures, and the said invention consists in the construction, combination and and claimed.

The object of the invention is to provide a metallic car door which is light, cheap and simple and is very strong and durable.

In the accompanying drawings,-Figure 1 is an elevation of a door and door hanging devices therefor constructed in accordance with my invention. Fig. 2 is a horizontal sectional view of the same, taken on the plane indicated by the line a-a of Fig. l.

The exterior frame 1 of the door 2 is made of angle metal, preferably iron or steel. The door frame is divided into panels by a vertical bar 3 and a horizontal bar 4f, which bars 3 and 4 are made of T-iron or steel, as shown in Fig. 2. The panels are lled by plates 5 of iron or steel which bear against the inner webs of the angle metal frame 2 and of the T-bars 3 and 4, withv their edges bearing against the outstanding webs of such frame and bars 3, 4. In the corners of they panels are triangular plates 6 which are provided with outstanding webs 7 that bear against and are riveted to the outstanding webs of the bars or frame 2, 3 and 4, as shown.

It will be understood ,that the door thus constructed is exceedingly strong and dul rable and is also readily manufactured at comparatively small cost.

Specification of Letters Patent.

Application filed September 13, 1907. Serial No. 392,744.

Patented J an. 25, 1910.

' Supporting hangers for the door are indicated at 18. Upper and lower supporting bars or rails are indicated at 9-10 between which the hangers operate when the door is opened or closed.

is claimed as new, is

The herein described door comprising an outer frame the side and end bars of which are L-shaped in cross section so that each bar has an outer web and a base web which eX- said base webs `o the said bars lying in a common plane, cross bars of T-metal arranged in intersecting planes, one connecting the end bars of the outer frame and the other connecting the side bars'thereof, each of said cross bars having its base web in line with those of said side and end bars, plates between the cross bars and the bars of the outer frame, bearing on the base webs and webs thereof and reinforcing triangular pieces bearing on and riveted to the said plates at the corners thereof, and having outstanding ianges bearing against and riveted to the outer webs of the side, end and cross bars, those of the said triangular pieces at the innercorners of the said plates serving to brace the cross bars at the peints of intersection, those of the said pieces at the outer ends of the cross bars serving to brace the same and the centers of the side andend bars, and those of the said pieces in the angles between the side and end bars at the lCorners of the door serving to brace the corners of the outer frame.

In testimony whereof'I aiiix my signature in presence of two witnesses.'

CHARLES M. DONALDSON. Witnesses:

W. E. DONALDSON, W. H. OsoRNE.

Having thus described the invention, what l tends at right an les to said outer web, the' arrangement of devices hereinafter described having their edges presented to the outer- 

